COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2018
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IF 2.829
Alemtsehay Tesfay Reda,Dongxiang Zhang,Xin Lu
A composite material of europium hydroxide (Eu(OH) 3 ) and glycine (Gly) is synthesized successfully to produce single phase material (Eu(OH) 3 -Gly) which exhibits extremely selective capturing and high removal rate towards uranyl (UO 2 2+ ) ion in an aqueous solution. Eu(OH) 3 -Gly displayed distribution coefficient (K d ) of 3.23 × 10 7 mL/g and removal rate of 100% to lower UO 2 2+ ion concentration from 25 ppm to <1 ppb inside 15 min and these criteria place Eu(OH) 3 -Gly among the top existing adsorbents for such adsorption. Adsorption kinetics for UO 2 2+ follows pseudo-second-order model, proposing a chemisorption adsorption mechanism mainly via H 2 N-U-NH 2 and O-U-O interactions. Eu(OH) 3 -Gly showed good stability after the removal of uranyl ion as investigated by FT-IR and thermogravimetric analysis (TGA) methods. According to TG analysis, Eu(OH) 3 -Gly showed less weight loss (23.7%) after adsorption compared with that of before adsorption (32%), suggesting that the attachment of uranium to the adsorbent contributed for the improvement of the thermal stability of Eu(OH) 3 -Gly.
研究领域:
材料科学
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环境科学
·
放射化学
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DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Long Yu,Hongxia Chen,Ji Yue,Xinfeng Chen,Mingtai Sun,Jing Hou,Khalid A. Alamry,Hadi M. Marwani,Xiangke Wang,Suhua Wang
Metal-organic framework is an extended coordination compound with repeating coordination entities and voids, which shows potential applications in gas storage, separation, catalysis, and etc. This work reports the synthesis of a new functional metal-organic framework of pyromellitic acid and europium , and its application in fluorescence sensing of doxycycline , a broad-spectrum polyketide antibiotic on the basis of fluorescence turn-on method. The metal-organic framework was initially non-fluorescent, however, with the addition of doxycycline, the system exhibited significant fluorescence enhancement at 526 nm and 617 nm, where both fluorescence intensities showed good linear correlations with the doxycycline concentration, suggesting the possibility for direct two-channel detection without any sensitization materials such as metal particles or surface-modified quantum dots . More interestingly, the unique fluorescence response of the system could discriminate doxycycline from other tetracycline antibiotics with high selectivity, and a limit of detection (LOD) was estimated to be 47 nM. It has been further demonstrated that the material has been successfully applied as sensing materials for selective determination of doxycycline in real samples of fish and urine.
研究领域:
分析化学
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材料科学
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药物检测
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Le Liang,Su-qian Cai,Yan-li Leng,Chan Huang,Yong-qing Liu,Ye Wang,Li Luo,Mei Han,Xiao-hong Li,Xiao-hua Cai
Ciprofloxacin (CIP) and gallium (Ga) are widely used in many fields and their excessive presences will pose serious threats to the environment and life health. Therefore, developing an intelligent detection method for rapidly tracking and determination of CIP and Ga 3 ⁺ concentration in environments and organisms is of great significance. In this work, a europium-doped carbon dots (Eu-CDs) with unique structure and performances was prepared by a one-pot hydrothermal method. Eu-CDs can efficiently overcome the problem of aggregation-induced fluorescence quenching in complex environments to track CIP and Ga 3⁺ with highly sensitivity. The "antenna effect" of non-radiative energy transfer is introduced to explain the pathway on fluorescence transition of Eu-CDs through DFT theoretical calculations and mechanism investigations, which provide a theoretical basis for the design and development of novel carbon dots with specific functions. Eu-CDs can successfully be applied to fluorescence imaging in organisms, moreover, it also exhibits excellent application potentials in the field of anti-tumor and antibacterial. In addition, a portable intelligent detection platform based on Eu-CDs-hydrogel device have been developed, which provides a new strategy for rapidly detection of CIP and Ga 3⁺ in real samples.
研究领域:
分析化学
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环境科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Yijian Zhao,Meiyi Liu,Shuai Zhou,Zhiyu Yan,Jingsheng Tian,Qiaojuan Zhang,Zhiyi Yao
Accurate on-site analysis of tetracycline (TC) is of great research value for ensuring food safety and estimating environmental pollution. Herein, a smartphone-based fluorescent platform for TC detectionhas been developed based on a europium functionalized metal–organic framework (Zr-MOF/Cit-Eu). Based on the inner filter and antenna effect between Zr-MOF/Cit-Eu and TC, the probe exhibited a ratiometric fluorescent response toward TC, resulting in an emission color change from blue to red. Excellent sensing performance was achieved with a detection limit of 3.9 nM, consistent with the linear operation spanning nearly four orders of magnitude. Subsequently, visual test strips based on Zr-MOF/Cit-Eu were prepared, possessing the potential for accurate testing of TC via RGB signals. Finally, the proposed platform was well applied in actual samples with satisfied recoveries (92.27 to 110.22%). This MOF-based on-site fluorescent platform holds great potential on constructing intelligent platform for visual and quantitative detection of organic contaminants.
研究领域:
分析化学
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食品安全
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环境科学
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产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2016
·Vol. 2017
·期 3
·651-658
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IF 2.686
Dongping Su,Ying Liu,Shimeng Li,Songdong Ding,Yongdong Jin,Zhipeng Wang,Xiaoyang Hu,Lirong Zhang
Graphical The steric effects of the branched chains of a series of alkyl-substituted pyridylpyrazole ligands on the extraction of Am III and Eu III ions were investigated in HNO 3 medium. These ligands exhibit good selective extraction abilities for Am III ions, and the steric effects of the branched chain have a significant impact on the distribution ratios ( D Am and D Eu ) and the separation factor (SF Am/Eu ). To clarify the structure–property relationships of pyridylpyrazole ligands and provide guidance for the design of new and more efficient ligands for the selective extraction of actinides over lanthanides, a series of alkyl-substituted pyridylpyrazole ligands with different branched chains at different positions of the pyrazole ring were synthesized. Extraction experiments showed that the pyridylpyrazole ligands exhibited good selective extraction abilities for Am III ions, and the steric effects of the branched chain had a significant impact on the distribution ratios of Am III and Eu III ions as well as the separation factor. Moreover, both slope analyses and UV/Vis spectrometry titrations indicated the formation of a 1:1 complex of 2-(1-octyl-1 H -pyrazol-3-yl)pyridine (C8-PypzH) with Eu III ions. The stability constant (log K ) for this complex obtained from the UV/Vis titration was 4.45 ± 0.04. Single crystals of the complexes of 3-(2-pyridyl)pyrazole (PypzH) with Eu(NO 3 ) 3 and Sm(NO 3 ) 3 were obtained; PypzH acts as a bidentate ligand in the crystal structures, and the N atom with a bound H atom did not participate in the coordination. In general, this study revealed some interesting findings on the effects of the alkyl-chain structure and the special complexation between pyridylpyrazole ligands and Ln III ions.
研究领域:
化学
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放射化学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2018
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IF 2.88
Zhan Zhou,Jiapei Gu,Yuze Chen,Xiaoxia Zhang,Haixia Wu,Xiaoguang Qiao
Bacillus anthracis spore causes anthrax to seriously threaten human health and even cause death. 2,6-Pyridinedicarboxylic acid (DPA) is a unique biomarker because it is a major component of Bacillus anthracis spore. Herein, we design europium functionalized silicon quantum dots as a ratiometric fluorescent nanoprobe to detect DPA with high sensitivity and selectivity. With the addition of DPA, the red emission peaks were observed at 618 nm. The novel probe enables ratiometric and sensitive DPA detection over nanomolar concentrations (as low as 1.02 μM). This work provided an efficient background-free and self-calibrating method for the recognition of DPA.
研究领域:
生物化学
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纳米医学
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分析化学
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产品关联
DOI
PubMed
高影响因子
TALANTA
·
2024
·
IF 5.6
Xing-Hui Ren,Zi-Bo Ma,Hao-Rui Zhang,Xi-Wen He,Wen-You Li,Yu-Kui Zhang
Given the threat to human health posed by the abuse of tetracycline (TC), the development of a portable, on-site methods for highly sensitive and rapid TC detection is crucial. In this work, we initially synthesized europium-doped silicon nanoparticles (Si Eu NPs) through a facile one-pot microwave-assisted method. Due to its blue-red dual fluorescence emission (465 nm/621 nm), which was respectively attributed to the silicon nanoparticles and Eu 3+ , Si Eu NPs were designed as a ratiometric fluorescent sensor for TC detection. For the dual-signal reverse response mechanism: TC quenched the blue emission from silicon nanoparticles through inner filter effect (IFE), and enhanced the red emission through “antenna effect” (AE) between TC and Eu 3+ , the nanoprobe was able to detect TC within a range of 0.2–10 μM with a limit of detection (LOD) of 10.7 nM. Notably, the equilibrium detection time was only 1 min, achieving rapid TC detection. Furthermore, TC was also measured in real samples (tap water, milk and honey) with recoveries ranging from 95.7 % to 117.0 %. More importantly, a portable smartphone-assisted on-site detection platform was developed, enabling real-time qualitative identification and semi-quantitative analysis of TC based on fluorescence color changes. This work not only provided a novel doped silicon nanoparticles strategy, but also constructed a ratiometric sensing platform with dual-signal reverse response for intuitive and real-time TC detection.
研究领域:
分析化学
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环境科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
TALANTA
·
2021
·
IF 6.057
Yu Liang,Yuan Yan,Hong Yan Zou,Tong Yang,Shu Jun Zhen,Chun Mei Li,Cheng Zhi Huang
Excess free copper in serum has been identified to induce neurodegenerative diseases such as Alzheimer's disease, thus it is very important to determine copper (II) ions (Cu 2+ ) content for human health test. Herein we developed a point-of-care testing (POCT) platform through a luminescence “on-off” recognition mechanism of serum copper. Microsized europium coordination polymer particles (Eu-CPs), which was prepared with citric acid (CA) and europium nitrate hexahydrate through a hydrothermal route, were then successfully loaded with the mixture of 2,6-pyridinedicarboxylic acid (DPA) and poly(vinyl alcohol) (PVA) to form electrospun nanofibrous films (ENFFs). The as-prepared Eu-CPs/DPA/PVA ENFFs exhibited red emission at 618 nm when exciting at 280 nm, with the quantum yields of 22.2% owing to the antenna effect from DPA to Eu 3+ . Furthermore, the strong luminescence could be selectively quenched by Cu 2+ through coordination with DPA to interrupt the antenna effect. With that, Cu 2+ was successfully detected in the range of 2–45 μM with a detection of limit of 1.3 μM, well matching with the requirement of clinic test of excess free copper induced neurodegenerative diseases. As a proof of concept at last, this POCT platform was used to detect free copper in spiked serum samples with a recovery of 101.1%–105.2%, demonstrating that this platform provides significant potential for use in clinical test.
研究领域:
生物医学工程
·
分析化学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Beibei Zhao,Xinfang Liu,Zheng Cheng,Xu Liu,Xiaoyu Zhang,Xun Feng
Pymetrozine (PYM) is an effective pyridine insecticide for controlling aphids, while its residues pose a serious threat to human health. Herein, a europium complex (Eu-DBPA, DBPA represents deprotonated 2,5-dibromoterephthalic acid ligand) probe was prepared for the detection of PYM via fluorescence quenching . The detection process has the advantages of short response time (2 min), wide linear range (0–4 and 4–45 mg/kg) and low detection limit (2.2 μg/kg). Furthermore, a portable detection platform was designed by integrating Eu-DBPA-based paper strip with smartphone and applied for the visual detection of PYM in real cucumber, tomato, cabbage and apple samples, obtaining satisfactory recovery (99.00 %–107.00 %) and low standard deviation (RSD < 3.4 %). In addition, a logic gate device was designed to simplify the detection process. The smartphone-integrated paper-based probe detection platform provides a new strategy for intelligent and online identification of hazards in environmental and biological samples.
研究领域:
分析化学
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环境科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2017
·
IF 2.686
Chao Quan,Wentao Xu,Youfu Zhou,Decai Huang,Zhonghua Deng
A novel Eu-doped strontium magnesium aluminate phosphor (Sr 2 MgAl 22 O 36 :Eu 2+ , SMAO:Eu 2+ ) and its partial nitridation compound (Sr 2 MgAl 22 O 36-3/2x N x :Eu 2+ , SMAON:Eu 2+ ) have been synthesized successfully via a solid state reaction with Al 2 O 3 partly substituted by AlN. The specimen preserves the main phase of Sr 2 MgAl 22 O 36 as a certain amount of AlN incorporated. SMAON:Eu 2+ phosphors showed a broad blue emission band around 460 nm under ultraviolet-light excitation (340 nm), arising from the variation of emission energy between nitrogen doped and un-doped phosphor. The emission intensity of SMAON:Eu 2+ phosphors are increased up to 153% compared with that of SMAO:Eu 2+ . With the increase of Eu 2+ concentration, luminescent intensity of the phosphors increases continuously and reaches a maximum value at the concentration of 0.16 Eu 2+ . It is noteworthy that the PL intensity of SMAON:Eu 2+ increases to 129% at 200 °C in comparison with that of room temperature ( vs 58% for SMAO:Eu 2+ comparably), exhibiting excellent thermal stability.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Zhan Zhou,Xiangqian Li,Jinwei Gao,Yiping Tang,Qianming Wang
Considerable interest in using lanthanide complexes in optics have been well-known persisted for a long time. But such molecular-based edifices have been excluded from practical application because of their poor thermal or photo stabilities. Here a novel europium embedded layered double hydroxide (Mg–Al LDH–Eu) has been established and such an inorganic–organic framework demonstrates improved thermal performance due to hydrolysis and poly condensation of the trimethoxysilyl-unit. In addition, the incorporation of a functional building block such as ethylenediamine triacetic acid can significantly minimize the negative effects of hydroxyl groups. In the presence of tetracycline (Tc), the nanoprobe exhibits an “off–on” change in aqueous solution, and the red luminescence can be excited in the visible light range (405 nm). It provides a very sensitive signal response to Tc with an excellent linear relation in the range of 0.1 μM to 5.0 μM, and the detection limit of this probe is measured to be 7.6 nM. This nanoplatform exhibits low cytotoxicity during in vitro experiments and can be employed for the detection of tetracycline in 293T cells.
研究领域:
材料科学
·
生物医学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Zongliang Xiao,Weizhen Liu,Gan Wan,Jianlei Liu,Lu Yu,Qian Zhang,Lei Han
The quest for advanced full-spectrum lighting technologies has driven the development of W-LEDs, while challenges remain in finding effective cyan emitters and ensuring outstanding thermostability. This study detailed the synthesis of the europium-doped CaO-Al 2 O 3 -SiO 2 -YF 3 glass-ceramics (GCs), which demonstrated efficient cyan emission when irradiated by 419 nm light, with a spectacular internal quantum efficiency of up to 83.24 %, and outstanding thermal stability of 90.2 %@100℃ compared to room temperature intensity. In practical applications, this GC was integrated with a 420 nm LED chip, (Sr, Ca)AlSiN 3 : Eu 2+ red and Y 3 Al 5 O 12 : Ce 3+ yellow phosphor in a prototype full-spectrum W-LED device. The device achieved an excellent color rendering index (94), appropriate chromaticity coordinates (0.3789, 0.3950), and a well-defined correlated color temperature (4163 K). This study not only advances the application of GCs within W-LED technology but also reveals their potential in driving energy-saving and eco-friendly lighting solutions, thus providing a path to achieve superior full-spectrum lighting technology.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）